Sand blast nozzle control



1 Sgpt. 21, 1948. w, RICH 2,449,672

SAND BLAST NOZZLE CONTROL Filed May 27, 1947 INVENTOR. jZ/cfi r A frog V573 Patented Sept. 21, 1948 UNITED STATES PATENT OFFICE SAND BLAST NOZZLE OONTROL William A. Rich, Leipsic, Ohio Application May 27, 1947, Serial No. 750,660

3 Claims. 1

This invention relates to an improvement in sand blast nozzle controls.

In carving and lettering granite and marble, the usual practice is to direct a stream of sand blast abrasive normally against the face of the work. Such a device is commonly known as a straight shooter. A serious difliculty with machines of this type is that the spent abrasive collides with the oncoming abrasive, thereby greatly decreasing the efiiciency.

It is a principal object of the present invention to provide a nozzle that will direct the abrasive against the sides of the letters or carvings. The nozzle is caused to oscillate, thereby permitting the exhaust to be cleared out of the way of the oncoming abrasive.

A preferred embodiment of the invention is shown in the accompanying drawings, but it is understood that modifications may be made without departing from the spirit of the invention as hereinafter claimed.

Figure 1 is a bottom plan View of the new and improved nozzle control.

Figure 2 is a side view of the structure shown in Figure 1.

Figure 3 is a side view of a modified form of nozzle control.

A hose l carries compressed air and abrasive and has attached thereto a nozzle l l. A concentric swivel I3 is attached either to the nozzle II or to the portion of the hose l0 adjacent the nozzle II. A clamp I4 is gripped to the hose I0 rearwardly of the swivel l3, and an integral hinge It extends forwardly from the clamp I4, as best shown in Figure 2 of the drawings. Two resilient arms l8 are pivoted to the swivel l3 and are joined by a cross-piece [9 that is caught between the hinge I6 and the hose ID.

The hose I0 is shown slightly bowed upwardly in Figure 2. When the bowed portion of the hose I0 is depressed, the nozzle II will oscillate in a vertical plane to accomplish the desired carving. The amplitude of the oscillations of the nozzle II will be determined by the amount of bowing of the hose Ill, and the latter is controlled by the spacing between the fixed swivel l3 and the clamp l4 that is made movable with respect to the swivel l3. As hereinbeiore mentioned, the abrasive is directed against the sides of the letters or carving, and the result is a sharp, clear-cut incision. The movement of the nozzle II on the swivel l3 will greatly reduce the collision of the exhaust and the oncoming abrasive.

Of course, when it is desired to oscillate the nozzle ll about a vertical axis, the entire device is shifted 90 about the axis of the nozzle. As

shown in Figures 1 and 2, the nozzle I I is shown ready for use in a vertically oscillable movement.

In Figure 3 is shown a modified form of device. A collar 20 is positioned about the hose Ill between the swivel I3 and the clamp l4, and a lever 10 easy means for depressing the hose 20 to produce the desired oscillation. A handle 21 may be positioned on one or both arms I8 to assist in manipulating the device.

I claim:

1. In combination with a hose and a nozzle,

means for controlling the movement of the nozzle, comprising a swivel fixed to the hose adjacent the nozzle, a clamp fixed to the hose rearwardly of the swivel, and means for resiliently joining the swivel and the clamp, whereby the hose may be flexed between the swivel and the clamp.

2. In combination with a hose and a nozzle, means for controlling the movement of the nozzle, comprising a swivel fixed to the hose adjacent 25 the nozzle, a clamp movably secured to the hose rearwardly of the swivel, and a spring arm pivoted to the swivel and resiliently and removably joined to the clamp, whereby the hose may be oscillated transversely between the swivel and the 0 clamp.

3. In combination with a hose and a nozzle, means for controlling the movement of the nozzle, comprising a swivel fixed to the hose adjacent the nozzle, a clamp movably secured to the hose r, rearwardly of the swivel, a hinge extending from the clamp toward the swivel, a resilient U-shaped arm having its legs pivoted to the swivel and the base of the U frictionally held by the hinge, a collar mounted on the hose between the swivel and the clamp, and a lever pivoted to the swivel WILLIAM A. RICH.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Name Date Heaslet Sept. 3, 1912 Peik s-m...- Apr. 3, 1935;

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